Heating furnace



May 24, 1932. J. F. BEANS HEATING FURNACE Milled July 13, 1928 J. F.BEANS May 24, 1932.

HEATING FURNAGE 3 Sheets-Sheet Filed July 13, 1928 @wom/Lio@ MMM MINIMUM-JFea/Lr atroz my May 24, 1932. 1 FY BEANS 1,859,760

Filed July 15, 1928 :5 Sheets-'Sheet 5 A 3mm/toc l JFeq/U attozmq [WWWIHWMH UlWlU FHNW WMM W u.. b. [oil ...mi |\||I\.|. nu wh. w l n y.NMwllmm. WHILIIHI M \||||\l WIW. h. Mullll ivi-ew of the furnace takenPatented May 24, 1932 JOHN r. BEANS, or MAssILLoN, onro HEATING FURNACApplication lcd Jlily 13, 1928. Serial No. 292,534.

The invention relates to furnaces for heating, heat treating, orannealing metal articles and more particularly to a furnace especiallyadapted for the treatment of the leaves ofv automobile springs and thelike.

The obj ect of the improvement isto provide a furnace for the continuousheat treatment of such articles; tov provide an arrangement of burners,furnace Walls and flues designed to obtain the best results; and toprovidean improved continuous chain conveyer for carrying the springleaves or the like of various lengths continuously through the furnace.The above and other objects may be attained by constructing the furnacein the manner illustrated in the accompanying drawings, in which Figurel is a plan sectional view of the improved furnace taken substantiallyon the line 1 1, Fig. 2;

Fig. 2,. a vertical longitudinal sectional substantially on the line 22, Fig. 1;

Fig. 3, an end sectional view through the furnace taken substantially onthe line 3--3, Fig. 1;

Fig. 4., an enlarged detail perspective view of one of the chainattachments, showing the T-shaped material supporting plate carriedthereby;

Fig. 5, an enlarged fragmentary plan sectional view of a portion of theconveyer chain and Fig. 6, a side elevation thereof.

Similar numerals refer to similar parts throughout the drawings.

The furnace may comprise the side walls 1 and 1a, end walls 2 and roof3, built of suittition wall or hearth 4 extends longitudinally throughthe furnace and is provided, at spaced intervals, 'with the longitudinalslots 5 for a purpose to be hereinafter described.

The furnace is thus divided by this horizontal chamber 6 and the lowerchamber 7 which is maintained at a considerably cooler temperature, theends 8 thereof being preferably open to the outside atmosphere. Y

The roof 3 is preferably arched and inpartition'wall into the upperheating clined downward from the side wall 1a to the side wall 1, asbest illustrated in Fig. 3. Upwardly inclined, inwardly flared openings9 are provided at intervals in the side wall 1a for the reception of theupwardly inclined burners 10, by means of which fluid fuel may beadmitted to the combustion chamber for maintaining the same at thenecessary temperature.

It will be noted that these burners are located near the arched roof anddirected towa rd the highest portion thereof whereby the flames andgases of combustion will be caused to swirl downward along the inclinedroof and back over the horizontal partition wall l, discharging throughthe openings 10 in the side wall la, at the lower portion of thecombustion chamber.

These discharge openings 11 communicate, by means of the horizontalpassages 11a, through the side wall 1a, with the lues 12. Y

The longitudinal slots 5 the horizontal partition wall 4 may be widenedbelow the top of said Wall as indicated at 13. Mounted within thewidened portions of these slots are longitudinal channel bars 14supported Aas-by the longitudinal and transverse I-bealns 15 and 1.6respectively. An endless conveyer chain 17 is arranged to operateVthrough each of the slots 5, the upper strand of each chain beingadapted to slide upon the channel bar 14. These conveyer chains operateover sprocket wheels' 1S 4and 18av located beyond the feed and dischargeends respectively of the furnace.v

The sprocket wheel-s 18 may be mounted upon a shaft 19 journaled insuitablebearp ings 2O carried as by the support brackets 21. ablerefractory material. A horizontal par- The sprocketv Wheels 18a may bemounted upon the drive shaft which may be journale-d in the bearings 23carried by the support 'bracketsl 24.

A large gear 25'may be fixed upon the drive Ashaft 22 `and arranged tomesh with the pinion 26 of a gear reduction 27, whicll is driven nsbythe motor 28, whereby the chains 17 are arranged to travel inv thedirection of the arrows shown on the drawings.-

Each. link- 29 of each of the sprocket chains lisadapted tor/carryanattachment 30 inl the all) form of an inverted T, the head 3l thereofbeing connected to the link as by the bolts 82.

The upper end of each of these attachments is preferably provided with asocket or slot 33 open at one side as at 34 and disposed in parallelrelation to the direction of travel of the conveyer for the easyinsertion or removal of the shank 35 of a T-shaped material carryingplate 36, preferably formed of heat resisting alloy.

The material carrying plates 36 areb arranged to be fixed in the sockets33 of the attachments as through the slots 5 in the horizontal partitionwall or hearth 4E.

i rlhe head 3S of each of these T-shaped material carrying plates isadapted to project above the hearth and is twisted at an angle to theshank, which is disposed parallel to the direction of travel of theconveyor, and the head is of such length that the ends thereof overlapthe ends of adjacent T-plates as best illustrated in Figs. 5 and 6 ofthe drawings.

lVith this construction of conveyer, it will be seen that the springleaves may be laid transversely across the conveyer chai-ns at any pointthereof without danger of the spring leaves dropping down between thematerial carrying plates of the chains while at the same time a flexiblechain is provided which may easily pass around the sprocket wheels.

By spacing the several conveyer chains at different distances from eachother, it will be seen that spring leaves of Various lengths may beaccommodated by different pairs of the chains, or by all three of thechains, as is required.

As the greatest wear will be upon the T- shaped material carryingplates, which extend into the combustion chamber and are subjected tothe highest temperature, it is desirable to form these plates of heatresisting alloy and to provide means whereby they may be easily removedfrom the attachments on the chain and quickly replaced.

The attachments and chain being located below the combustion chamberwill receive the benefit of the cooling atmospheric air passing throughthe lower chamber 7 and need not necessarily be made of heat resistingalloy.

From the above it will be obvious that a simple and efficient heatingfurnace is provided, having a conveyer mechanism well adapted forcontinuously carrying spring leaves and the like through the furnacewithout danger of the material being caught in the conveyer, whereby thespring leaves may be quickly and easily fed upon the conveyer at theentrance end of the furnace and discharged therefrom at the exit endthereof.

I claim l. In a continuous furnace, a hearth provided wit-h alongitudinal slot, a conveyor by the bolts 87, and extend for carryingmaterial through the furnace, T-shaped material carrying plates on theconveyor extending through said longitudinal slot, the shank portion ofeach plate being parallel to the direction of travel of the conveyor,and the head portion of each plate being twisted at an angle to theshank and overlapping the head portions of adjacent plates, and the headportion of each plate projecting above the furnace hearth.

2. In a continuous furnace, a hearth provided with a longitudinal slot,a conveyor for carrying material through the furnace, attaching membersupon the conveyor provided with slots disposed in parallel relation tothe direction of travel of the conveyor, T-shaped material supportingplates extending through the slot in the hearth outwardly from theconveyor at right angles thereto and having their shank portionsremovably disposed in the slots in the attaching members, the headportion of each plate projecting above the hearth and being twisted atan angle to the shank and overlapping the head portions of adjacentplates.

3. In a continuous furnace, a hearth provided with a longitudinal slot,a conveyor for carrying material through the furnace, material carryingplates on the conveyor extending through said longitudinal slot, eachplate including an inner portion parallel to the direction of travel ofand secured to the conveyor and located in the slot, and an outermaterial supporting portion projecting above the hearth, the outerportion of each plate being twisted at an angle to the inner portionthereof and overlapping the outer portions of adjacent plates.

In testimony that I claim the above, I have hereunto subscribed my name.

JOI-IN F. BEANS.

